Finding the Third Proportional to 49,708.69 and 70,978.78

Step by Step Solution

1. Step 1: Write the proportion equation
   49,708.69 : 70,978.78 = 70,978.78 : x
2. Step 2: Convert to fraction form
   49,708.69/70,978.78 = 70,978.78/x
3. Step 3: Cross multiply
   49,708.69x = 70,978.78 × 70,978.78
4. Step 4: Simplify right side
   49,708.69x = 5,037,987,387.74
5. Step 5: Solve for x
   x = 5,037,987,387.74/49,708.69
6. Step 6: Final answer
   x = 101,350.24